Class: FXDCPostscript

Inherits:
FXDC
  • Object
show all
Defined in:
lib/IFMapper/FXDCPostscript.rb

Overview

Class used to do Postscript printing. This class has only the basic functionality needed for doing so and replaces the still somewhat buggy version of Fox’s 1.2 FXDCPrint

Constant Summary collapse

@@printcmd =

-#%d’

'lpr -P%s -o l -'

Instance Method Summary collapse

Methods inherited from FXDC

#drawBSpline

Constructor Details

#initialize(app) ⇒ FXDCPostscript

Returns a new instance of FXDCPostscript.



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# File 'lib/IFMapper/FXDCPostscript.rb', line 393

def initialize(app)
  @font = app.getNormalFont()
end

Instance Method Details

#_header ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 57

def _header
  @f.puts <<'HEADER'
%%!PS-Adobe-3.0
%%%%Title: Print Job
%%%%Creator: IFMapper
HEADER

end

#_rect(x, y, w, h) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 233

def _rect(x, y, w, h)
    xl, yt = tfm(x, y)
    xr, yb = tfm(x + w - 1, y + h - 1)
    bbox(xl,yt)
    bbox(xr,yb)
    @f.print "newpath %g %g moveto %g %g lineto %g %g lineto %g %g lineto %g %g lineto " % 
	[xl,yt,xr,yt,xr,yb,xl,yb,xl,yt]
end

#bbox(x, y) ⇒ Object

Extends bounding box with point x,y



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# File 'lib/IFMapper/FXDCPostscript.rb', line 226

def bbox(x, y)
  @xmin = x if x < @xmin
  @ymin = y if y < @ymin
  @xmax = x if x > @xmax
  @ymax = y if y > @ymax
end

#beginPage(num = 1, &block) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 176

def beginPage(num = 1, &block)
  # Output page number
  @f.puts "%%%%Page: #{@page} #{@page}" # Ghostscript requests this, I do not know if it is right

  # Reset page bounding box
  if @flags & PRINT_NOBOUNDS != 0
    @xmin= 1000000;
    @xmax=-1000000;
    @ymin= 1000000;
    @ymax=-1000000;
    @f.puts "%%%%PageBoundingBox: (atend)"
  else
    # Use the doc bounding box
    @f.puts "%%%%PageBoundingBox: %d %d %d %d" % [@xmin, @ymin, @xmax, @ymax]
  end

  # Page setup
  @f.puts "%%%%BeginPageSetup"
  @f.puts "%%%%EndPageSetup"
  @f.puts "gsave"

  # Maybe in landscape?
  if @flags & PRINT_LANDSCAPE != 0
    @f.puts "#{@width} 0.0 translate"
    @f.puts "90 rotate"
  end

  if block_given?
    yield self
    endPage()
  end
end

#beginPrint(printer, &block) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 66

def beginPrint(printer, &block)
  @flags = printer.flags
  if @flags & PRINT_DEST_FILE != 0
    @f = File.open( printer.name, 'w' )
  else
    buffer = @@printcmd % [ printer.name, printer.numcopies ]
    puts buffer
    @f = File.popen( buffer, 'w')
  end


  @width  = printer.mediawidth.to_f
  @height = printer.mediaheight.to_f

  @xmin   = printer.leftmargin.to_f
  @xmax   = @width - printer.rightmargin 

  @ymin   = printer.bottommargin.to_f
  @ymax   = @height - printer.topmargin 


  _header
  if @flags & PRINT_NOBOUNDS != 0
    xmin = 10000000.0
    xmax = -xmin
    ymin = 10000000.0
    ymax = -ymin
    @f.puts "%%%%BoundingBox: (atend)"
  else
    @f.puts "%%%%BoundingBox: %d %d %d %d" %
	[ @xmin, @ymin, @xmax, @ymax ]
  end

  @numpages = 1 + printer.firstpage - printer.lastpage
  if    @flags & PRINT_PAGES_ODD
    @numpages = 1 + (printer.topage - printer.frompage) / 2  
  elsif @flags & PRINT_PAGES_EVEN
    @numpages = 1 + (printer.topage - printer.frompage) / 2  
  elsif @pages & PRINT_PAGES_RANGE
    @numpages = 1 + printer.topage - printer.frompage
  end

  if @numpages == 0
    @f.puts "%%%%Pages: (atend)"
  else
    @f.puts "%%%%Pages: #{@numpages}"
  end

  @f.puts "%%%%DocumentFonts:"
  @f.puts "%%%%EndComments"
  @f.puts "%%%%BeginProlog\n\n"

  # Various definitions
  @f.puts "%% h w x y drawRect\n"
  @f.puts "/drawRect {\n\tnewpath moveto dup 0 rlineto exch dup 0 exch\n\trlineto exch neg 0 rlineto neg 0 exch rlineto\n\tclosepath stroke\n} def\n"
  @f.puts "%% h w x y fillRect\n"
  @f.puts "/fillRect {\n\tnewpath moveto dup 0 rlineto exch dup 0 exch\n\trlineto exch neg 0 rlineto neg 0 exch rlineto\n\tclosepath fill stroke\n} def\n"
  @f.puts "%% x y a b drawLine\n"
  @f.puts "/drawLine {\n\tnewpath moveto lineto stroke\n} def\n"
  @f.puts "%% x y ..... npoints drawLines\n"
  @f.puts "/drawLines {\n\t3 1 roll newpath moveto {lineto} repeat stroke\n} def\n"
  @f.puts "%% x y a b ..... nsegments drawSegmt\n"
  @f.puts "/drawSegmt {\n\tnewpath {\n\t\tmoveto lineto\n\t} repeat stroke\n} def\n"
  @f.puts "%% x y drawPoint\n"
  @f.puts "/drawPoint {\n\ttranslate 1 1 scale 8 8 1 [ 8 0 0 8 0 0 ] {<0000>} image\n} def\n"
  @f.puts "%% centerx centery  startAngle endAngle radiusX radiusY drawArc\n"
  @f.puts "/drawArc {\n\tgsave dup 3 1 roll div dup 1 scale 6 -1 roll\n\texch div 5 1 roll  3 -2 roll arc stroke grestore\n} def\n"
  @f.puts "/fillChord {\n\tgsave dup 3 1 roll div dup 1 scale 6 -1 roll\n\texch div 5 1 roll  3 -2 roll arc fill grestore\n} def\n"
  @f.puts "%% (string) x y height drawText\n"
  @f.puts "/drawText {\n\tgsave findfont exch scalefont setfont moveto\n\tshow grestore\n} def\n"


  @f.puts "%%%%EndProlog"

  @f.puts "%%%%BeginSetup"
  @f.puts "/#copies #{printer.numcopies} def"
  @f.puts "%%%%EndSetup"

  @page = 0

  if block_given?
    yield self
    endPrint()
  end
end

#drawLine(x1, y1, x2, y2) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 248

def drawLine(x1, y1, x2, y2)
  xx1, yy1 = tfm(x1, y1)
  xx2, yy2 = tfm(x2, y2)
  bbox(xx1,yy1)
  bbox(xx2,yy2)
  @f.puts "newpath %g %g moveto %g %g lineto stroke" % [xx1, yy1, xx2, yy2]
end

#drawLines(points) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 256

def drawLines(points)
  return if points.size < 2
  xx, yy = tfm(points[0].x, points[0].y)
  bbox(xx,yy)
  @f.print "newpath %g %g moveto" % [xx, yy]
  1.upto(points.size-1) { |i|
    xx, yy = tfm(points[i].x, points[i].y)
    bbox(xx,yy)
    @f.print " %g %g lineto" % [xx, yy]
  }
  @f.puts " stroke"
end

#drawRectangle(x, y, w, h) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 242

def drawRectangle(x, y, w, h)
  _rect(x, y, w, h)
  @f.puts "stroke"
end

#drawText(x, y, text) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 269

def drawText(x, y, text)
  # Draw string (only foreground bits)
  # Contributed by S. Ancelot <[email protected]>
  xx, yy = tfm( x, y )

  pxrange = @pxmax - @pxmin
  pyrange = @pymax - @pymin

  if @flags & PRINT_LANDSCAPE != 0
    mxmin = @ymin
    mxmax = @ymax
    mymin = @width - @xmax
    mymax = @width - @xmin
    mxrange = mxmax - mxmin
    myrange = mymax - mymin
  else
    mxmin = @xmin
    mxmax = @xmax
    mymin = @ymin
    mymax = @ymax
    mxrange = mxmax - mxmin
    myrange = mymax - mymin
  end

  fsize = 0.1 * @font.getSize

  # Hack...
  # Account for dpi and scale up or down with graph...
  # Perhaps override screen resolution via registry
  # FXint screenres=getApp()->reg().readUnsignedEntry("SETTINGS","screenres",100);
  # Validate
  screenres = 100
#     if(screenres<50) screenres=50;
#       if(screenres>200) screenres=200;

  if pyrange / pxrange <= myrange / mxrange
    # short/wide
    fsize *= (mxrange/pxrange)*(screenres/72.0)
  else
    # tall/thin
    fsize *= (myrange/pyrange)*(screenres/72.0)
  end

  fname = @font.name
  if fname =~ /times/i
    fname = 'Times-Roman'
  elsif fname =~ /(helvetica|verdana|tahoma|arial)/i
    fname = 'Helvetica'
  else
    fname = 'Courier'
  end

  if @font.getWeight == FXFont::FONTWEIGHT_BOLD
    fname << '-Bold'
    if @font.getSlant == FXFont::FONTSLANT_ITALIC
	fname << 'Italic'
    elsif @font.getSlant == FXFont::FONTSLANT_OBLIQUE
	fname << 'Oblique'
    end
  else
    if @font.getSlant == FXFont::FONTSLANT_ITALIC
	fname << '-Italic'
    elsif @font.getSlant == FXFont::FONTSLANT_OBLIQUE
	fname << '-Oblique'
    end
  end

  @f.puts "(%s) %g %g %d /%s drawText" % [text, xx, yy, fsize, fname]
end

#endPage ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 209

def endPage
  @f.puts "%%%%PageTrailer"

  # We now know the bounding box
  if @flags & PRINT_NOBOUNDS != 0
    if @xmin < @xmax and @ymin < @ymax
	@f.puts "%%%%BoundingBox: %d %d %d %d" [@xmin, @ymin, @xmax, @ymax]
    else
	@f.puts "%%%%BoundingBox: 0 0 100 100" # Gotta come up with something...
    end
  end
  @f.puts "showpage"
  @f.puts "grestore"
  @page += 1
end

#endPrint ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 153

def endPrint
  @f.puts "%%%%Trailer\n"

  # We now know the bounding box
  if @flags & PRINT_NOBOUNDS != 0
    if @xmin < @xmax and @ymin < @ymax
	@f.puts "%%%%BoundingBox: %d %d %d %d" %
 [ @xmin, @ymin, @xmax, @ymax ]
    else
	@f.puts "%%%%BoundingBox: 0 0 100 100"
    end
  end

  # We now know the page count
  if not (@flags & PRINT_PAGES_ODD|PRINT_PAGES_EVEN|PRINT_PAGES_RANGE)
    @f.puts "%%%%Pages: #{page}"
  end

  @f.puts "%%%%EOF"
  @f.close
end

#fillPolygon(points) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 344

def fillPolygon(points)
  return if points.size < 3
  xx, yy = tfm(points[0].x, points[0].y)
  bbox(xx,yy)
  @f.print "newpath %g %g moveto" % [ xx, yy ]
  1.upto(points.size-1) { |i|
    xx, yy = tfm(points[i].x, points[i].y)
    bbox(xx,yy)
    @f.print " %g %g lineto" % [ xx, yy ]
  }
  @f.puts " fill"
end

#fillRectangle(x, y, w, h) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 339

def fillRectangle(x, y, w, h)
  _rect(x, y, w, h)
  @f.puts "fill"
end

#font ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 401

def font
  return @font
end

#font=(x) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 397

def font=(x)
  @font = x
end

#foreground=(c) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 365

def foreground=(c)
  if c.kind_of?(String)
    clr = fxcolorfromname(c)
  else
    clr = c
  end
  @f.puts "%g %g %g setrgbcolor" % [FXREDVAL(clr)/255.0,FXGREENVAL(clr)/255.0,FXBLUEVAL(clr)/255.0]
end

#lineCap=(x) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 377

def lineCap=(x)
  ncap = 0
  ncap = 1 if CAP_ROUND == x
  ncap = 3 if CAP_PROJECTING == x
  @f.puts "#{ncap} setlinecap"
end

#lineJoin=(x) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 374

def lineJoin=(x)
end

#lineStyle=(x) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 357

def lineStyle=(x)
  if x == LINE_SOLID
    @f.puts "[ ] 0 setdash"
  elsif x == LINE_ONOFF_DASH
    @f.puts "[2 2] 0 setdash"
  end
end

#lineWidth ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 384

def lineWidth
  return @lineWidth
end

#lineWidth=(x) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 388

def lineWidth=(x)
  @lineWidth = x
  @f.puts "%f setlinewidth" % [x * 0.5]
end

#setContentRange(xmin, ymin, xmax, ymax) ⇒ Object 



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# File 'lib/IFMapper/FXDCPostscript.rb', line 11

def setContentRange(xmin, ymin, xmax, ymax)
  @pxmin = xmin.to_f
  @pymin = ymin.to_f
  @pxmax = xmax.to_f
  @pymax = ymax.to_f
end

#tfm(xi, yi) ⇒ Object

Transform point



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# File 'lib/IFMapper/FXDCPostscript.rb', line 19

def tfm(xi, yi)
  pxrange = @pxmax - @pxmin
  pyrange = @pymax - @pymin

  if @flags & PRINT_LANDSCAPE != 0
    mxmin = @ymin.to_f
    mxmax = @ymax.to_f
    mymin = @width - @xmax
    mymax = @width - @xmin
    mxrange = mxmax - mxmin
    myrange = mymax - mymin
  else
    mxmin = @xmin
    mxmax = @xmax
    mymin = @ymin
    mymax = @ymax
    mxrange = mxmax-mxmin
    myrange = mymax-mymin
  end

  if pyrange/pxrange <= myrange/mxrange
    # short/wide
    xo = mxmin + ((xi.to_f-@pxmin)/pxrange) * mxrange;
    yo = mymin + 0.5 * (myrange-pyrange * (mxrange/pxrange)) + 
 (pyrange-yi.to_f) * (mxrange/pxrange)
  else
    # tall/thin
    xo = mxmin + 0.5 * (mxrange-pxrange * (myrange/pyrange)) + 
	xi * (myrange/pyrange)
    yo = mymin + ((pyrange-yi.to_f)/pyrange) * myrange
  end
  return [xo, yo]
end